[LAU] ZFS?

[A. P. Garcia]

Hi,

I knew a systems engineer at Oracle who used Solaris with ZFS for an
8T or so music file server. He ripped his CD collection onto it, and
performance was fine. I'm not sure whether he used raidz{1,2} or
mirroring, but like Joe said, your best bet is to try mirroring. If
you want the highest performance you can possibly squeeze out of
linux, I would recommend doing some benchmarking of various
combinations of md, lvm, and different filesystems with the type of
workload you intend to use.


Regards,
Phil Garcia

On Thu, May 10, 2018 at 9:50 AM, Joe Hartley <jh at brainiac.com> wrote:
> On Thu, 10 May 2018 09:12:44 -0400
> Peter Lutek <peter at peterlutek.com> wrote:
>
>> greetings, all!
>>
>> wondering if anyone has experience using a ZFS raidZ2 disk pool for
>> audio. i'm talking about a LOCAL pool, running on ZOL
>> (http://zfsonlinux.org/) -- NOT a LAN-connected dedicated server.
>
> Hi, Peter.  I have not used a ZFS pool for audio work, but I used to
> work in the ZFS group at Oracle.  RAIDZ2 optimizes your available space
> at the price of performance.  If I was going to record multiple tracks in
> a DAW to a ZFS pool, I'd be using a mirrored pool.
>
> The ZFS RAID levels are designed to spread the load around, and bog down
> with a small number of drives.  Given that this is a local pool we're talking
> about, we're likely talking about 4 or 5 drives in the pool at best.  You
> might be OK given that the pool is dedicated to the machine, but I'd test it
> thoroughly.  I'd avoid RAIDZ1 - there's insufficient redundancy and has led to occasional data loss.
>
> Depending on the devices, you might be OK - a pool of SSDs will be better
> than a pool of spinning drives, for example.  If you only ever record a max
> of 2 tracks at a time, you'll also likely be fine.
>
> This is based on my experiences with big loads on a ZFS storage appliance;
> you may have a very different experience with the local pool under Linux.
>
> Good luck!
>
> --
> ======================================================================
>        Joe Hartley - UNIX/network Consultant - jh at brainiac.com
>  Without deviation from the norm, "progress" is not possible. - FZappa
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